package model;

public class EmptyOutput implements Output{

	private static EmptyOutput instance;
	/**
	 * Provides the singleton instance of {@link EmptyOutput}.
	 * @return the instance of {@link EmptyOutput}.
	 */
	public static EmptyOutput getInstance(){
		if(instance == null){
			instance = new EmptyOutput();
		}
		return instance;
	}
	/**
	 * Constructor of {@link EmptyOutput}.
	 */
	private EmptyOutput(){}
	@Override
	public String getString() {
		return "";
	}

}
